OK, have the keys to the '03 X5 for about a week now and getting used to the many options.
In the manual, this area is the "check control alphanumerical display" -- the one where it kicks up "lights on" "release parking brake" etc messages.
Anyways, was driving early morning (frosty temps) up a small rise when I noticed "6-54-40-ST" in the display area. It only lasted for a few seconds that I noticed.
Any tips on what that was? TIA. I may have brushed against the BC button on the steering wheel clock by accident beforehand.